/**
 * Copyright (c) 快宝网络 kuaidihelp.com Co., Ltd. All Rights Reserved 禁止外泄以及用于其它的商业用途
 */

import { fetch, router } from 'dva';
import { notification } from 'antd';
import qs from 'qs';
import { crypto } from './encryption';

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
};

function checkStatus(response) {
  const { status } = response;
  if ((status >= 200 && status < 300) || status == 422) {
    return response;
  }
  const errortext = codeMessage[status] || response.statusText;
  notification.error({
    message: `请求错误 ${status}: ${response.url}`,
    description: errortext,
  });
  const error = new Error(errortext);
  error.name = status;
  error.response = response;
  throw error;
}

/**
 * 请求中的队列，防止重复请求
 *  */
// const reqQueen = new Map();

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"，allowConcurrent：允许相同的请求并发进行
 * @return {object}           An object containing either "data" or "err"
 */
export default async function request(url, options) {
  const defaultOptions = {
    credentials: 'include',
  };
  const newOptions = { ...defaultOptions, ...options };
  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
        ...newOptions.headers,
      };
      newOptions.body =
        newOptions.method === 'POST'
          ? qs.stringify(newOptions.body)
          : JSON.stringify(newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        ...newOptions.headers,
      };
    }
  }
  // const reqKey = `${url}_${newOptions.body}`

  // if (reqQueen.has(reqKey) && !newOptions.allowConcurrent) {
  //   return new Promise(resolve => {
  //     resolve({});
  //   });
  // }

  // reqQueen.set(reqKey, 'pending')
  const url_ = await crypto({
    url,
    options: newOptions,
  });

  return fetch(url_, newOptions)
    .then(checkStatus)
    .then(response => {
      if (newOptions.method === 'DELETE' || response.status === 204) {
        return response.text();
      }
      const result = response.json();
      result.then(res => {
        // reqQueen.delete(reqKey)
        if (res.code == 1059) {
          // 返回1059说明返回失效，返回登陆页
          window.g_app._store.dispatch(
            router.routerRedux.push({
              pathname: '/user/login',
            }),
          );
        }
      });
      return result;
    })
    .catch(e => {
      const status = e.name;
      // reqQueen.delete(reqKey)
      if (status === 401) {
        window.g_app._store.dispatch({
          type: 'login/logout',
        });
      }
    });
}
